Analysis of MRI Image to Develop the Aid During the Radiological Test of Femoro Acetabular Impingement

Abstract

Background/Objectives: It is to sustain the test accuracy and improve diagnostic capability of selfdeveloped
aid in Dunn view to confirm modification of pistol grip in neck of femur that causes anterior
femoro acetabular impingement.
Method/Statistical Analysis: The test was performed before and after the usage of the self-developed aid
in the patients referred to the test of Dunn view (45 and 90-degree flexion) who were scheduled with hip
arthroscopy. ?-angle and femoral head–neck offset were measured by oblique transverse images in MRI test
and statistical significance was analyzed with paired T-test.
Findings: In the MRI images and Dunn 45° and 90° images before and after ancillary device use, as a result
of measuring and analyzing ?-angle, it was not statistically significant at 45° (P>0.05), but it was found
there was statistical significance in 90° (P<0.05). In the MRI images and Dunn 45° and 90° images before
and after ancillary device use, as a result of measuring and analyzing femoral head-neck offset, it was found
there was statistical significance in both 45° and 90° (P<0.05).
Improvements/Applications: Upon the comparison results of unidirectional image and MRI test before
and after the use of the aid in this study, statistically significant outcomes were found in 45 and 90 degree of
Dunn view after the use of the aid. Therefore, it is considered that they could be used as the foundation data
in the image studies with Dunn view.